Implement Analysis controller

[bacherfl]

Implement Analysis controller:

Depends on #1768
Depends on #1769
Depends on #1758

In this ticket, the Analysis controller shall be implemented. The logic of the controller should be as follows:

• Whenever an Analysis is added/updated, the controller should look for the referenced AnalysisDefinition.
• When the referenced AnalysisDefinition has been found, the controller should gather all AnalysisValueTemplates required by the AnalysisDefinition.
• For each of the referenced AnalysisValueTemplates, the controller should use the available implementations of the metric providers to fetch the data using the query specified in the AnalysisValueTemplates, including the timeframe and selectors
  from the Analysis spec.
• After all values are available, the controller should invoke the scoring function that has been implemented in Implement sloTarget scoring logic to evaluate AnalysisValues based on sloTargets of AnalysisDefinition #1767, and store the result in the
  status of the Analysis. At this point, the Analysis has been reconciled successfully.

DoD

• Analysis controller is implemented
• Unit Tests
• Integration Tests

References

Bigger picture of the concept: #1650

[odubajDT]

resolved with #1875